Quoted from Bublehead:

Not all of us... I wouldn't try to squeeze profit out of an innocent old widow. I'd offer to represent her and sell it for what it's worth and split the difference with her or offer her $3000 outright. Thats still under market value, and she gets an extra $1000, and I get a WW for $3K. Thats how you keep karma off your back.

Quoted from Bublehead:

She gets $1000 more of my money than from the next guy that you know is going to buy it at $2000... I ask you how many other people would do that? Not many.

Quoted from Mattyk:

Sorry but if you selling something or trading something it’s your job to know what it’s worth. Plain and simple.
Also, If someone wants to pay a stupidly high price for something, that does not mean they are getting ripped off. It means that they value the game more than what the normal market calls for.
If someone really loves Fish Tales and one never shows up in their area for them to purchase, they may decide to spend an extra couple grand over “market” to entice sometime to sell it to them. They did not get ripped off. They simply bought a game at a value that made sense to them.

Quoted from CrazyLevi:

Yeah, if I'm ripping off a little old lady, I'm just go whole hog and do it the right way.
What's the point in leaving some of my profits on the table just to make myself feel a little better?
Besides, it's super easy to rationalize this shit. When I was taking a HUO Spider Man out of a lady's house for $2,500 because her kids were gone and she wanted the room in her basement back I didn't hesitate. She was more than happy to get the cash, and I was doing her a favor by not doing the ole nitpick routine and trying to talk her down on site, and by providing a quick, easy, and professional game extraction that was fast and clean, didn't damage her house etc.
The last thing I was thinking was to talk her into accepting another $500 so I could sleep 8 percent better at night. What's the point?
As long as all parties are happy with the deal I really don't see a problem.

Quoted from DarthPaul:

So my question is, will the value of 90's era DMD machines start to go down as more and more of the newer machines replace them in the top 100 spots?

Quoted from MtnFrost:

I have to disagree here. The best pins were those before we got DMDs, licensed themes, toys and clutter. I focus on 80-82. Fathom, Flash Gordon, Medusa, Frontier, Centaur, EBD, Xenon - from Stern: Seawitch, Nineball, Stargazer, Iron Maiden, from Williams: Black Knight, Solar Fire, Pharaoh, Jungle Lord, Firepower, etc., from Gottlieb: Black Hole, Haunted House, Spirit. Original Unlicensed themes and great play.
I know there's plenty in the range you mentioned too, but I just think we shouldn't discount the greats.